<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title></title>
		<script src="js/vue.js" type="text/javascript" charset="utf-8"></script>
	</head>
	<body>
		<!-- view -->
		<div id="app">
			<h3 v-if="tab==1">首页</h3>
			<h3 v-else-if="tab==2">新闻页</h3>
			<h3 v-else>个人中心</h3>
			
			<button @click="tabChange" data-id="1">首页</button>
			<button @click="tabChange" data-id='2'>新闻</button>
			<button @click="tabChange" data-id='3'>个人</button>
		</div>
		
		<script type="text/javascript">
			let app = new Vue({
				el:"#app",
				data:{
					tab:1
				},
				methods:{
					tabChange:function(e){
						//console.log(e)
						let tabid = e.target.dataset.id
						//app.tab = tabid//跟this.tab=tabid等同
						this.tab = tabid
					}
				}
			})
		</script>
	</body>
</html>
